反应详情

Mono(2-hydroxyethyl)sebacate and 23.6 g (0.1 mole) 1,2,2,6,6-pentamethylpiperidin-4-ol 17.1 g (0.1 mole) were esterified by heating with 0.4 g toluenesulfonic acid catalyst and 100 cc toluene in a reflux apparatus including a Dean-Stark trap to collect the reaction water as it evolved. When no more water obtained 22.2 g (0.15 mole) triethyl orthoformate was added and heating under reflux continued for 9 hours. Stripping under vacuum removed toluene and excess triethyl orthoformate, and left an oily liquid product represented by formula ##STR49##

1. customto collect
2. customthe reaction water as it